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The car idles rough and seems to be really rough when you rev the engine. For some background, I think the P07XX codes are older codes from the tranny. I flushed it due to having the 'Transmission Service Required' light, which is no longer in by the way.

I reseated the gas cap just in case. No change.

I hope it is a single problem causing this problem, and obviously that the single problem isn't going to cost me $5K. O2 sensor maybe?

Any help would be greatly appreciated.

Dave

PS. I have a 2003 XC70 with 192K miles. Been a great car, but the expensive repairs are starting to get a little old, which is why I am trying to learn to do them myself.

Thats a lot of different stuff on this code list. This car stores all the codes it ever encountered unless someone clears it. Every car I've put my Volvo VIDA/DiCE tool on gave a full fault code report for several years. Many of them are no longer active. All codes basically will come with the following info but probably need the Volvo tool to get the details

When it occurred, how many times it occurred since the first time, when was the last time it occurred

Don't know what diag tool autozone uses but I wonder if they are pulling out all the codes including the currently inactive ones.

I loaded two pics; there is an item forward of the air filter housing. It is plastic, and unscrews. When all this happened, my wife looked under the hood and saw it was apart. We screwed it back together. Do you know what it is, and is there supposed to be something inside of it?